出典:Wiktionary
出典:『Wiktionary』 (2025/10/18 00:30 UTC 版)
right angle (plural right angles)
出典:『Wiktionary』 (2008/06/02 03:47 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/02 23:21 UTC 版)
In geometry and trigonometry, a right angle is an angle that bisects the angle formed by two halves of a straight line. More precisely, if a ray is placed so that its endpoint is on a line and the adjacent angles are equal, then they are right angles. As a rotation, a right angle corresponds to a quarter turn (that is, a quarter of a full circle).
| ・right angle | |
| ・mockingbird | |
| ・bountiful | |
| ・polymerizer | |
| ・sn | |
| ・Okay. | |
| ・Chernobylite | |
| ・deserving | |
| ・type C | |
| ・PF |